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Articles by Million Fikreselassie
Total Records ( 4 ) for Million Fikreselassie
  Million Fikreselassie , Nigussie Alemayehu and Habtamu Zeleke
  In order to evaluate selection procedures 144 random sample of fenugreek accessions collected from locations at heights ranging from 1750 to 3150 m, along with one released variety, were used in this study for designating a core collection representative of the whole range of accessions used in the study. The field experiment was conducted at Adadi and Ambo Research Center during 2006 and 2007 main cropping seasons. Treatments were arranged in a 12x12 simple lattice design. The data were subjected to multivariate analyses for different clustering methods, performed using the SAS software. Homogeneity test (F-test) for variance and a t-test for means (p<0.05) were performed to determine the differences of traits between the core and the initial collections. Furthermore, the characteristic of the core collection in terms of the initial collection was determined by coincidence rate and the variable rate. Core collections established by distinct clustering and sampling methods were representatives of the initial collection, with exception of the collection constructed by Ward’s clustering method combined with random sampling. This observation indicates that the genetic variation available in the initial collection can be preserved in the nine established core collections. These core subsets can be used as a point of entry for efficient and effective exploitation of germplasm resources for the improvement of the crop.
  Million Fikreselassie
  In order to best exploit the available genetic wealth in the crop, the information would have paramount important. Therefore, this study was conceived to examine the variability, heritabilities and determines the relative importance of primary and secondary traits as selection criteria to improve productivity. The field experiment was conducted at Haramaya University research field, Ethiopia during 2011 main cropping season. Twenty-five elite field pea genotypes along with two commercial varieties were arranged in randomized complete block design with three replications. The data were subjected to the analyses of variance using the SAS program software. The mean squares of the genotypes were highly significant for all of the characters. The genotypic coefficient of variation ranged from 11.19% for days to mature to 25.72% for number of seeds per plant. The estimated broad sense heritability ranged from 19.24% for stand count to 50.81% for days to flowering. Genetic gains that could be expected from selecting the top 5% of the genotypes varied from 11.45% for stand count to 33.08% for number of seeds per plant. The first five principal components accounted for more than 77% of the total variation. The first principal component accounted for about 43.75% of the variability due to Phenological traits. The materials were grouped into eight clusters based on Mahalanobis’ D2 statistic. Seed yield per plant had significant associations with most of the traits. The path analysis at genotypic level revealed that harvest index and biomass yield contributed major positive direct effects on seed yield.
  Million Fikreselassie and Habtamu Seboka
  Faba bean is one of the most important cool season crops in the highlands of Ethiopia and the country is considered as the secondary center of diversity. This study was conducted at Haramaya, Boreda and Hirna districts of Eastern Hararghe from 2006 to 2008 cropping season using twenty five elite genotypes of faba bean to determine the extent and pattern of genetic diversity for seed yield and related traits. The treatments were arranged in a randomized complete block design with three replications. The data were subjected to the analyses of variance using the SAS program. The mean squares due to genotypes were highly significant for seed yield (p<0.01) indicating the existence of sufficient genetic variability for seed yield. Mean squares due to the interaction between year and location were highly significant for all the traits studied (p<0.01). High genotypic coefficient of variation (10093.53%) was observed for seed yield followed by number of seeds per plant (325.45%). The estimated values of phenotypic variances were in the range of 0.60 for number of seeds per pods to 196564.64 for seed yield. Genetic gains that expected from selecting the top 5% of the genotypes, as a percent of the mean, varied from 12.32% for number of seeds per plant to 35.46% for seed yield. The average linkage technique of clustering produced a more understandable portrayal of the 25 faba bean genotypes by grouping them into five clusters. The maximum distance was found between cluster three and five (D2 = 691.47). Thus, the materials tested in the entire experiment will be maintained for further breeding program.
  Million Fikreselassie
  Systematic breeding efforts on fenugreek have so far been neglected in Ethiopia. For this, 143 random samples of fenugreek accessions along with a commercial variety were used in this study to evaluate the potential of the land races. The field experiment was conducted at Haramaya University research station during 2011 main cropping season. Treatments were arranged in a 12x12 simple lattice design. The highest biomass and seed yielding accessions were generally concentrated more in the categories of yellow and green seed colors. When compared with the commercial variety, above 27% of the tested accessions performed significantly better in terms of seed yield indicating that significant yield gains could be secured by simple selection. However, further evaluation over wider environments is necessary to arrive at conclusive points for such quantitative traits. Green and yellow seeded accessions are widely distributed over all the country and over half of the accessions (63%) had green seed color. High seed yield bearing accessions were those collected from northwest and central part of Ethiopia, while accessions collected from eastern and northwestern Ethiopia were strikingly bold seed size. This variability would provide a basis for improving the crop in breeding program.
 
 
 
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